<template>
  <div>
    <!--  面包屑-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--  视图区-->
    <el-card>
      <!--      警告提示-->
      <el-alert title="注意：只允许第三级分类设置相关参数！" type="warning" show-icon :closable="false"></el-alert>
      <!--      选中商品分类区-->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <!--          选中商品分类的级联选择框-->
          <el-cascader expandTrigger='hover' v-model="selectedCateKeys" :options="catelist" :props="cateProps"
                       @change="handleChange">

          </el-cascader>
        </el-col>
      </el-row>
      <!-- tabs标签页区 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数面板 -->
        <el-tab-pane label="动态参数" name="many">
          <!-- 添加参数的按钮  -->
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数
          </el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!--            展开航-->
            <el-table-column type="expand">
              <!--              玄幻渲染tag标签-->
              <template slot-scope="scope">
                <el-tag v-for="(item ,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">
                  {{ item }}
                </el-tag>
                <!--                输入的文本框-->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                  <!--                  添加按钮-->
                </el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag
                </el-button>
              </template>
            </el-table-column>
            <!--            索引列-->
            <el-table-column type="index"></el-table-column>
            <!--            表单区-->
            <el-table-column label="参数"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">
                  编辑
                </el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性面板 -->
        <el-tab-pane label="静态属性" name="only">
          <!-- 添加属性的按钮  -->
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性
          </el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!--            展开航-->
            <el-table-column type="expand">
              <!--              玄幻渲染tag标签-->
              <template slot-scope="scope">
                <el-tag v-for="(item ,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">
                  {{ item }}
                </el-tag>
                <!--                输入的文本框-->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                  <!--                  添加按钮-->
                </el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag
                </el-button>
              </template>
            </el-table-column>
            <!--            索引列-->
            <el-table-column type="index"></el-table-column>
            <!--            表单区-->
            <el-table-column label="参数"></el-table-column>
            <el-table-column label="名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">
                  编辑
                </el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

      </el-tabs>
    </el-card>
    <!--    添加参数的对话框-->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%" @close="addDialogClosed">
      <!--      添加参数的对话框-->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
    </el-dialog>
    <!--    修改参数的对话框-->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%" @close="editDialogClosed">
      <!--      添加参数的对话框-->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      catelist: [],           //商品列表数据
      selectedCateKeys: [],   //级联选择框绑定的数组
      activeName: 'many',          //被激活的页签名称
      manyTableData: [],     //动态参数数据列表
      onlyTableData: [],     //静态参数数据列表
      addDialogVisible: false,   //添加的对话框的显示隐藏
      // 级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 添加参数的表单属性对象
      addForm: {
        attr_name: '',
      },
      // 添加参数表单的验证规则对象
      addFormRules: {
        attr_name: [
          {required: true, message: '请输入名称', trigger: 'blur'}
        ]
      },
      // 控制修改对话框显示隐藏
      editDialogVisible: false,
      // inputVisible: false,   //控制按钮和文本框的切换显示
      // inputValue: '',   //文本框输入的内容
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        attr_name: [
          {required: true, message: '请输入名称', trigger: 'blur'}
        ]
      }

    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取所有的数据列表
    async getCateList() {
      const {data: res} = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        this.$message.error('获取商品分类失败！')
      }
      this.catelist = res.data
      // console.log(this.catelist)
    },
    // 级联选择框选择的时候触发的事件
    handleChange() {
      this.getParamsData()
    },
    // tab页签点击事件触发函数
    handleTabClick() {
      console.log(this.activeName);
      this.getParamsData()
    }
    ,
    // 获取参数的列表
    async getParamsData() {
      // console.log(this.selectedCateKeys);
      // 判断选中的是否三级分类
      if (this.selectedCateKeys.length !== 3) {
        // 说明选中的是不是三级分类
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      // 说明选中的是三级分类
      // console.log(this.selectedCateKeys);
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: this.activeName}})
      if (res.meta.status !== 200) {
        return this.$message.error('添加失败！')
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false   //控制文本的隐藏显示
        item.inputValue = ''     //文本框输入的值
      })
      console.log(res.data);
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
      this.$message.success('添加成功')
    },
    // 监听添加对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 添加按钮确定操作
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败！')
        }
        this.$message.success('添加参数成功！')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 点击按钮修改的对话框
    async showEditDialog(attr_id) {
      // 先查询当前参数的信息
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`, {
        params: {attr_sel: this.activeName}
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败！')
      }
      this.$message.success('获取参数信息成功！')
      console.log(res.data);
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 重置修改的表单
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮修改信息
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
          attr_name: this.editForm.attr_name, attr_sel: this.activeName
        })
        if (res.meta.status !== 200) {
          this.$message.error('修改参数失败！')
        }
        this.$message.success('修改参数修改成功！')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    // 根据id删除对应的参数项
    async removeParams(attr_id) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 用户取消了删除
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      // 用户确定删除--继续删除请求
      //  this.$http.delete(`categories/:id/attributes/:attrid}`)
      const {data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败！')
      }
      this.$message.success('删除成功！')
      this.getParamsData()

    },
    // 文本框失去焦点获取摁下enter触发事件
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      // 如果是没有return的话输入的内容是合法的--需要后续处理
      //输入内容添加到循环数组row.attr_vals里，并且去掉前后空格
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''         //添加完-输入框值没意义--清空
      row.inputVisible = false   //输入框隐藏
      await this.saveAttrVals(row)  //这个方法attr_vals的添加请求操作抽离出来了

    },
    // 将对attr_vals操作报错在数据库中---上的请求方法抽离出来
    async saveAttrVals(row) {
      // 方式请求报错这一次的操作
      const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' ')
        })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败！')
      }
      this.$message.success('修改参数项成功！')
    },
    // 点击按钮显示文本输入框
    showInput(row) {
      row.inputVisible = true
      // 让文本框自动活动焦点
      // $nextTick作用就是页面上的元素重新渲染完成后调用--获取的是最新的值
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    // 删除对应的选项--tag标签
    handleClose(i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    // 动态计算标题的文本
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  }

}
</script>

<style scoped lang="less">
.cat_opt {
  margin: 10px 0;
}

.el-tag {
  margin: 10px;
}

.input-new-tag {
  width: 120px;
}

</style>
